- Iḥyāʼ ʻulūm al-dīn (Ghazzālī)1
- Japan1
- Jerome, Saint, -419 or 4201
- Jewish (culture or style)1
- Jewish calendar1
- Jewish religious poetry, Hebrew1
- Jewish sermons, Hebrew1
- Jews--Conversion to Christianity1
- Jews--Legal status, laws, etc.1
- John II, King of Portugal, 1455-14951
- John, Duke of Burgundy, 1371-14191
- John, the Baptist, Saint1
- Joseph (Son of Jacob)1
- Judaism--Controversial literature1
- Judaism--Doctrines1
- Judeo-Arabic literature1
- Judeo-Persian language1
- Judges (Islamic law)1
- Judgment Day1
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Sharḥ mushkilāt al-Kashshāf1